USAGE : It is a console application so unzip the exe in a folder. Copy the current working metabase.xml and the backed up metabase.xml into the same folder. Then run

Metabaseimport <current_metabase.xml> <old_metabase.xml>

This will generate a file called NewMetaBase.xml with the Server Settings of the current working metabase.xml and the websites/ftp sites from the old metabase.xml. Stop IIS services. Replace the metabase in the inetsrv folder with the NewMetaBase.xml and start the IIS services. You will have all the old sites.